<!doctype html>
<html>
<head>
<title>Viewport: Dimensions with custom scrollbars</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="viewport_support.js"></script>
<script>
setup({explicit_done: true, explicit_timeout: true});
</script>
<style>
#spacer {
width: 10000px;
height: 10000px;
position: absolute;
visibility: hidden;
}
::-webkit-scrollbar {
width: 20px;
height: 25px;
}
::-webkit-scrollbar-track {
background-color: #b46868;
}
::-webkit-scrollbar-thumb {
background-color: rgba(0, 0, 0, 0.2);
}
</style>
</head>
<body>
<h1>Viewport: Dimensions with custom scrollbars</h1>
<h4>
Test Description: Tests the viewport dimensions correctly account for
custom scrollbars
</h4>
<h2 style="color: red">THIS IS A MANUAL TEST</h2>
<p id="skip">
<button id="skipbtn" onclick="skipManualTest();">Skip</button>
<p>
Skip this test if your browser doesn't support custom scrollbars or
browser-zoom (Ctrl+/-).
</p>
</p>
<p id="instruction"></p>
<button id="continue">Start Test</button>
<div id="log"></div>
<div id="spacer"></div>
</body>
<script>
var continueBtn = document.getElementById("continue");
function continueTest() {
nextStep(function(instructionText) {
var instruction = document.getElementById("instruction");
continueBtn.innerText = "Continue";
instruction.innerText = instructionText;
});
}
continueBtn.addEventListener('click', continueTest);
var originalWidth = 0;
var originalHeight = 0;
var originalInnerWidth = 0;
var originalInnerHeight = 0;
addManualTestStep(
function() {},
null,
'1. Ensure the browser is at the default pinch and browser zoom ' +
'levels (100%). Most browsers: ctrl+0');
addManualTestStep(
function() {
originalWidth = window.visualViewport.width;
originalHeight = window.visualViewport.height;
// Remember the inner dimensions here for the next test to
// address an edge case where originalInnerWidth is an odd
// number of pixels. The test expects that at 2x browser-zoom,
// visualViewport.width = innerWidth - customScrollbarThickness
// The equality only holds if originalInnerWidth / innerWidth is
// exactly 2, which is not the case in the aforementioned
// scenario because innerWidth always has to be an integer
// number of CSS pixels. Ditto for the height computation.
originalInnerWidth = window.innerWidth;
originalInnerHeight = window.innerHeight;
assert_equals(
window.visualViewport.width,
window.innerWidth - 20,
"Custom scrollbar width subtracted from viewport.");
assert_equals(
window.visualViewport.height,
window.innerHeight - 25,
"Custom scrollbar height subtracted from viewport.");
},
'No zoom or scale applied',
'2. Browser-zoom into 200% (ctrl +)');
addManualTestStep(
function() {
// Ensure we zoomed in to about what we expect.
assert_approx_equals(
originalInnerWidth / window.innerWidth,
2.0,
0.1,
"Browser zoom to correct level");
// The custom scrollbars are also 2x larger on the screen, so
// the viewport is smaller than half of the original size.
assert_equals(
window.visualViewport.width,
originalInnerWidth / 2 - 20,
"Custom scrollbar width subtracted from viewport.");
assert_equals(
window.visualViewport.height,
originalInnerHeight / 2 - 25,
"Custom scrollbar height subtracted from viewport.");
},
'With 200% browser zoom',
'3. Reset browser zoom (ctrl+0).');
addManualTestStep(
showPinchWidget.bind(null, 2.0, 0, 0, continueTest),
null,
'Pinch-zoom dialog in progress');
addManualTestStep(
function() {
assert_approx_equals(
window.visualViewport.scale, 2, 0.2, "Pinch zoom to correct scale");
// Scrollbars do not grow with pinch-zoom so they take up fewer
// CSS pixels as you zoom in.
assert_approx_equals(
window.visualViewport.width,
originalWidth / window.visualViewport.scale,
1,
"Custom scrollbar width subtracted from viewport.");
assert_approx_equals(
window.visualViewport.height,
originalHeight / window.visualViewport.scale,
1,
"Custom scrollbar width subtracted from viewport.");
},
'With ~200% pinch zoom',
'4. Pinch-zoom out.');
addManualTestStep(
function() { continueBtn.remove(); },
null,
'Test Complete');
</script>
</html>
Codebase Browser
chromium